Feedback on Design infiltration rate

In speaking with many researchers at the ASCE LID Conference, it has become apparent that there is a marked difference between "infiltration" and "hydraulic conductivity". In fact, the drawdown (infiltration) of many LID facilities is 8-16X the me...In speaking with many researchers at the ASCE LID Conference, it has become apparent that there is a marked difference between "infiltration" and "hydraulic conductivity". In fact, the drawdown (infiltration) of many LID facilities is 8-16X the measured Kfs. STEP produced a free training video which says as much. Therefore, while I do not have a recommendation to address this within the wiki, I would like to emphasize the importance of doing so. I get a lot of push back when it comes to any sort of retention in areas with clay soils that "don't infiltrate". I know STEP has some great data re: infiltration in clay soils (e.g. Elm Drive); is there some way that the F.S. or guidance converting Kfs to a DIR can be improved to better reflect true LID performance?More

Hi, I think it would be very beneficial to include typical infiltration rates for the different hydrologic soil groups that people could use for preliminary design purposes for water balance, LID design etc. when the available geotechnical report...Hi, I think it would be very beneficial to include typical infiltration rates for the different hydrologic soil groups that people could use for preliminary design purposes for water balance, LID design etc. when the available geotechnical report does not provide an infiltration rate/hydraulic conductivity, or a geotechnical report is pending. The Minnesota Stormwater Manual has a page like this (https://stormwater.pca.state.mn.us/index.php/Design_infiltration_rates), but working in Ontario it would be better to reference the STEP site, rather than an American source. This could be added with the disclaimer that actual on site infiltration rates should be measured prior to finalizing a design. If you review and find the Minnesota infiltration rates acceptable but don't want to include a similar table on your page, including a link to it would also be beneficial to confirm that STEP supports these values. Thanks! - Jessie Elder (Crozier & Associates)More